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Quantifying the surge-induced response of a floating tidal stream turbine under wave-current flows.
- Source :
-
Energy . Nov2023, Vol. 283, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Understanding the impact of dynamic effects induced by wave-current conditions on the hydrodynamic performance of a floating horizontal axis tidal turbine (HATT) is crucial toward developing floating tidal turbines to harness tidal energy in deep water sites. The complicated of the wake of a HATT has not yet been fully understood. In this paper, a Computational Fluid Dynamics (CFD) model used to study the performance of a turbine supported by a moored floating platform, due to surge only and in wave-current flows. The CFD model is compared against piled turbine tests, providing an error of 1.36% in power coefficients at the studied TSR = 3.9. It was shown that surge motion caused by even a small wave height or wavelength has a significant effect on the thrust and torque of the rotor. The wave height and period have a remarkable effect on the fluctuation of the hydrodynamic performance due to the induced rotor velocity. The surge motion affects the wake velocity recovery and vortex structure development. For a fuller understanding, future work could explore the negative effects such as induced blade fatigue and platform instability arising from surge motion, as to design cost-efficient turbines, supports and arrangements. • A CFD model predicts the coupled motion between the turbine and a moored floating platform under wave-current flows. • Waves alternates both the turbine's hydrodynamic coefficients and motion. • The increasing wave height and period have a positive impact on wake velocity recovery. • The wake vortex structure results more sensitive with wave period, rather than wave height. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TIDAL currents
*COMPUTATIONAL fluid dynamics
*TURBINES
*OCEAN waves
Subjects
Details
- Language :
- English
- ISSN :
- 03605442
- Volume :
- 283
- Database :
- Academic Search Index
- Journal :
- Energy
- Publication Type :
- Academic Journal
- Accession number :
- 172977244
- Full Text :
- https://doi.org/10.1016/j.energy.2023.129072